XML 64 R54.htm IDEA: XBRL DOCUMENT v3.8.0.1
Line of Credit (Details) - USD ($)
3 Months Ended 9 Months Ended
Oct. 27, 2017
Apr. 14, 2017
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Sep. 19, 2016
Line of Credit Facility [Line Items]                
Amount outstanding under line of credit     $ 114,000,000   $ 114,000,000   $ 49,987,000  
Interest expense on borrowings     800,000 $ 300,000 1,800,000 $ 900,000    
Line of Credit                
Line of Credit Facility [Line Items]                
Maximum borrowing capacity               $ 125,000,000
Letter of credit outstanding amount     $ 0   $ 0      
Line of Credit | US Bank                
Line of Credit Facility [Line Items]                
Effective interest rate     2.48%   2.48%      
Commitment fees         $ 0      
Line of Credit | US Bank | London Interbank Offered Rate (LIBOR) | Minimum                
Line of Credit Facility [Line Items]                
Basis spread on variable rate   1.25%            
Line of Credit | US Bank | London Interbank Offered Rate (LIBOR) | Maximum                
Line of Credit Facility [Line Items]                
Basis spread on variable rate   1.75%            
Line of Credit | US Bank | Base Rate | Minimum                
Line of Credit Facility [Line Items]                
Basis spread on variable rate   0.00%            
Line of Credit | US Bank | Base Rate | Maximum                
Line of Credit Facility [Line Items]                
Basis spread on variable rate   0.50%            
Line of Credit | US Bank | Enson                
Line of Credit Facility [Line Items]                
Subsidiary ownership percentage securing facility   65.00%            
Subsequent Event | Second Amended Credit Agreement | Line of Credit                
Line of Credit Facility [Line Items]                
Maximum borrowing capacity $ 170,000,000.0              
Subsequent Event | Second Amended Credit Agreement | Line of Credit | US Bank                
Line of Credit Facility [Line Items]                
Commitment fees $ 0              
Subsequent Event | Second Amended Credit Agreement | Line of Credit | US Bank | London Interbank Offered Rate (LIBOR) | Minimum                
Line of Credit Facility [Line Items]                
Basis spread on variable rate 1.25%              
Subsequent Event | Second Amended Credit Agreement | Line of Credit | US Bank | London Interbank Offered Rate (LIBOR) | Maximum                
Line of Credit Facility [Line Items]                
Basis spread on variable rate 1.75%              
Subsequent Event | Second Amended Credit Agreement | Line of Credit | US Bank | Base Rate | Minimum                
Line of Credit Facility [Line Items]                
Basis spread on variable rate 0.00%              
Subsequent Event | Second Amended Credit Agreement | Line of Credit | US Bank | Base Rate | Maximum                
Line of Credit Facility [Line Items]                
Basis spread on variable rate 0.50%